Sack Of Constantinople

S1 E2: Alexios Iii Angelos Usurped The Throne Of The Struggling Eastern Roman Empire In 1195 With No Allies And Very Few Resources For A Brief Moment However His Realm Was Stable That Stability Ended When Suddenly An Army Of Crusaders Found Itself At The Walls Of Constantinople How And Why Did The Fourth Crusade End Up Sacking Constantinople And What Were The Consequences